Scoped: updated numerous docs with scoped packages change [skip ci]

packages/babel-core/src/config/loading/files/configuration.js

@@ -106,7 +106,7 @@ const readConfigJS = makeStrongCache((filepath, cache) => {
     return null;
   }
 
-  // The `require()` call below can make this code reentrant if a require hook like babel-register has been
+  // The `require()` call below can make this code reentrant if a require hook like @babel/register has been
   // loaded into the system. That would cause Babel to attempt to compile the `.babelrc.js` file as it loads
   // below. To cover this case, we auto-ignore re-entrant config processing.
   if (LOADING_CONFIGS.has(filepath)) {

packages/babel-core/src/config/removed.js

@@ -25,9 +25,6 @@ export default {
     message:
       "use the `pragma` option in the `react-jsx` plugin . Check out http://babeljs.io/docs/plugins/transform-react-jsx/",
   },
-  // "keepModuleIdExtensions": {
-  //   "message": ""
-  // },
   loose: {
     message:
       "Specify the `loose` option for the relevant plugin you are using or use a preset that sets the option.",

packages/babel-core/src/index.js

@@ -39,8 +39,8 @@ export { default as transformFile } from "./transform-file";
 export { default as transformFileSync } from "./transform-file-sync";
 
 /**
- * Recommended set of compilable extensions. Not used in babel-core directly, but meant as
- * as an easy source for tooling making use of babel-core.
+ * Recommended set of compilable extensions. Not used in @babel/core directly, but meant as
+ * as an easy source for tooling making use of @babel/core.
  */
 export const DEFAULT_EXTENSIONS = Object.freeze([
   ".js",

packages/babel-core/src/transformation/block-hoist-plugin.js

@@ -9,7 +9,7 @@ let LOADED_PLUGIN: Plugin | void;
 export default function loadBlockHoistPlugin(): Plugin {
   if (!LOADED_PLUGIN) {
     // Lazy-init the internal plugin to remove the init-time circular
-    // dependency between plugins being passed babel-core's export object,
+    // dependency between plugins being passed @babel/core's export object,
     // which loads this file, and this 'loadConfig' loading plugins.
     const config = loadConfig({
       babelrc: false,